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Showing papers in "Comparative Biochemistry and Physiology Part A: Physiology in 1987"


Journal ArticleDOI
TL;DR: Brush border membrane vesicles prepared from midguts of Pieris brassicae larvae by Mg/EGTA precipitation and differential centrifugation transiently accumulated alanine, phenylalanine, histidine, lysine, or gultamic acid.

610 citations


Journal ArticleDOI
TL;DR: The results suggest that tissue catabolism of proteins was strongly increased in food-deprived buzzards, and blood glucose and cholesterol increased during fasting.

101 citations


Journal ArticleDOI
TL;DR: Functional analysis of peripheral blood leucocytes from cortisol-injected fish indicated that the remaining lymphocytes were no longer capable of responding to mitogenic stimuli, suggesting that the cortisol alone was probably not directly responsible for the loss of responsiveness but possibly acted in vivo as an initiator of other events that eventually resulted in the observed immunosuppression.

99 citations


Journal ArticleDOI
TL;DR: Blood values of the different parameters were studied on the basis of the ranges described in birds to establish patterns of diurnal variation in buzzards and eagle owls.

99 citations


Journal ArticleDOI
TL;DR: The extent to which emulsified perfluorocarbons may have value as substitutes for red blood cells is discussed in detail and Brief consideration is also given to the possible use of native and modified haemoglobin in blood replacement.

95 citations


Journal ArticleDOI
TL;DR: It appears that for dry habitat beetles, the metabolic rate is the single determinant of transpiratory water loss, which is interpreted as indicating that respiratory water loss is the dominating component of water loss in both carabids and tenebrionids in dry habitats.

89 citations


Journal ArticleDOI
TL;DR: Blood values of individual birds of prey in good and bad states of nutrition were compared, showing significant changes in cholesterol, hematocrit, urea and total protein values.

85 citations


Journal ArticleDOI
TL;DR: Results do not support the 'aerobic capacity' model of the origin of endothermy, and the mass exponent of the allometric regression equation for maximum metabolic rate is significantly higher than that for BMR.

77 citations


Journal ArticleDOI
TL;DR: It is concluded that urate may act as a true in vivo modulator of haemocyanin oxygen affinity and increase at both hypoxic levels tested and at high ambient temperature, but decreased in hyperoxic water.

77 citations


Journal ArticleDOI
TL;DR: Estradiol-17β and progesterone were found in the mandibular organ, green gland, hepatopancreas, ovary and serum of the American lobster by radioimmunoassay and their concentration in animals with immature ovaries was essentially the same as that found in Animals with developing ovaries.

74 citations


Journal ArticleDOI
TL;DR: It is concluded that the coronary circulation is important formaximum aerobic swimming and implicit in this conclusion is that maximum cardiac performance is probably necessary for maximum aerobic swimming performance.

Journal ArticleDOI
TL;DR: The results suggest that motility of Xenopus sperm is suppressed by seminal osmolality in the reproductive organ and initiated by a decrease of osmlality when they are spawned into hypotonic fresh water.

Journal ArticleDOI
TL;DR: The results are consistent with a physiologic set point determined by incubation temperature, which then influences rates for at least some physiologic phenomena.

Journal ArticleDOI
TL;DR: The contentious concept of metabolic cold adaptation in polar fish has been reviewed, and the opinion expressed that the phenomenon cannot be dismissed on the grounds of technically incompetent measurement, or through inappropriate extrapolation of data from fish at lower latitudes.

Journal ArticleDOI
TL;DR: The average daily net fat intake was much higher than the average dailyNet protein intake, both for maintenance of a constant body weight and for successful regain of weight, with respect to the role of a fruit diet in omnivorous passerine birds.

Journal ArticleDOI
TL;DR: Circulating levels of glucose, alpha-amino-nitrogen, beta-hydroxybutyrate, free fatty acids and triglycerides were measured in fed and 10-hr food-deprived Vesper sparrows, finding that food- DeprivedSparrows had significantly lower levels of circulating triglycerides and alpha-Amino nitrogen, and significantly higher levels of beta-Hydroxybutyrsate, as compared to fed sp Sparrows.

Journal ArticleDOI
TL;DR: Weight-specific respiration rates of medusae from the NE Pacific ranged from 0.1 to 0.3, suggesting thatmedusae lack thermal compensation, at least over short time-spans, and daily turnover of carbon due to respiration was estimated to equal 2–10% of total body carbon.

Journal ArticleDOI
TL;DR: The reduction in the oxygen consumption may be related to the poorly adapted respiratory system, while the decrease in activity may be a mechanism for saving energy during this hypoxic period.

Journal ArticleDOI
TL;DR: A sensitive enzyme-linked immunosorbent assay (ELISA) technique was used in order to determine horseradish peroxidase (HRP) uptake from the rainbow trout gut and the total organ accumulation was in the order liver greater than plasma greater than kidney greater than spleen greater than heart.

Journal ArticleDOI
TL;DR: In this paper, the authors investigated the effect of temperature on the digestibility of young iguanas, using a high-fiber food item (immature Lonchocarpus pentaphyllus leaves) normally eaten in the wild.

Journal ArticleDOI
TL;DR: All animals have arterial blood pressures capable of lifting the blood to the head without the assistance from a siphon, but in cases of longer vertical distances, such as in giraffes and climbing snakes, the heart does more work against the effects of gravity on the arterialBlood column.

Journal ArticleDOI
TL;DR: Wing-loading index (BW2/3/WA) gives the most effective variable to describe the flying habits of any species.

Journal ArticleDOI
TL;DR: Habituation and DA response to daily regrouping and inanition were inversely related in unstable and stable pairs respectively and normal whole brain NE increases were attenuated in unstable pairs.

Journal ArticleDOI
TL;DR: Food deprivation resulted in significant decreases in muscle carbohydrate, lipid and water content and increased ATP, ADP, AMP and total adenylate levels over the 21-day experimental period, indicating the necessity of examining organs separately to accurately ascertain metabolic changes in response to stressors.

Journal ArticleDOI
TL;DR: Relative tissue blood volumes were greatest in highly perfused tissues such as kidney, gills, brain and liver and least in mosaic muscle and the consistently smaller vascular volumes obtained with labelled erythrocytes could be explained by assuming that commonly used plasma space markers diffuse from the vascular compartment.

Journal ArticleDOI
TL;DR: The recorcling sites of 68 acoustical, visual and visual sensitive units and 36 bimodal units, predominantly encountered within the torus semicircularis, have been examined with respect to their response characteristics.

Journal ArticleDOI
TL;DR: Mud crabs were found to be oxyconformers with limited physiological capacity to survive hypoxic conditions, however they recognized low PO2 and climbed out of sea-water to breathe air.

Journal ArticleDOI
TL;DR: Assimilation efficiency for labelled bacteria and microalgae was measured in the fiddler crabs Uca vocans and U. polita and in the deposit-feeding gastropods Clithon oualaniensis and Cerithidea cingulata.

Journal ArticleDOI
TL;DR: Almost 20–25% of the changes in the concentrations of respiratory gases in the burrows of tiger beetle larvae are attributable to the metabolism of the larva, the remainder being due to diffusional exchanges with the soil.

Journal ArticleDOI
TL;DR: The responses seen in the hen to the two different types of stimuli appear to be similar to those occurring in mammals.